I am Christian but I was taught a different train of thought than it's God's will for you to be sick. I was taught that Satan uses sickness to turn us away from God by making us believe it is his will. Sickness is of Satan not of God, we do all we can to avoid evil, but sometimes it manages to slip through. I was also taught that it is a myth that Satan is God's ***** boy, Satan test our faith in the Lord, not the Lord himself. It is never really God's will for us to suffer, people are given free will and if I get hit by a bus then it technically isn't God's fault, it's the lazy drivers fault. In times of need God wants us to reach out to him, God is not trying to punish us because we made him angry or try us. God wants us to trust in him that everything will work out.
Another thing faith has taught me is that God says to heal the sick, not pray for them. Jesus healed everyone who came to him, and God wants us to be like Jesus, so instead of praying a blood cancer patient doesn't die I am better off doing something proactive and donating blood or bone marrow(this realization came to me a few days ago).
Different train of thought, a lot of people will disagree but Christianity is quite varied in how scriptures are interpreted, and this is what I believe. I was also raised to believe that there is a spiritual and physical realm and part of God lives inside us. We experience him on earth whether we can feel it or not. God doesn't necessarily give us anxiety to deal with, but he tries to give us hints about things we need to fix. When we experience anxiety, it is a result of a disconnect to our spiritual selves, when my dad laid it out to me like that it all made sense. There is something subconsciously wrong that God would like me to fix/resolve, and it is partially up to me to find it.
On another note it reminds me of what my mom said "We all talk about how heaven is this great place where there is no pain, no sickness, no sorrow, you get to see all your friends and family and maybe even Elvis, no one trying to ruin your life or stab you in the back, and you get to chill out all day long, hang out with Jesus and live in peace, yet we are all scared to go there".
Sorry to kinda ramble.